Safety-tread.



No. 637,437. Patented Nov. 2|, I899.

r. WEAR.

SAFETY TBEAD.

(Application filed Apr. 8, 1899.)

(No- Model.) v

UNITED STATES PATENT QFFICEQ FRANK WVEAR, OF MEDFORD, MASSACHUSETTS.

SAFETY-TREAD.

SPECIFICATION forming part of Letters Patent N 0. 637,437, dated November 21, 1899,

Application filed April 3 1899. Serial No. 711 ,634. (No model.)

the edges of the plate around the holes up-' ward and outward,and then by filling the holes with lead flush with the bottom of the plate and level with topof turned-up edges. The tread-plate thus obtained,havin g disks of lead elevated above the body of the plate and held firmly in position by the steel rim formed by the turned-up edges of the plate, acts as a safeguard against slipping and may be fastened to the surface of stair treads, platforms, sidewalks, carriage steps, or other places Where a firm footing is desired.

Figure l is a plan View of a portion of a tread-plate. Fig. 2 is a sectional view taken at line A Bof Fig. 1 and shows the form into which the edges of the plate are pressed up, as shown at O, and the lead filling at D.

I am aware that the combination of lead and iron or steel has been used for this purpose, and I therefore do not claim such a combination, broadly.

' What I do claim, and desire to secure by Letters Patent of the United States, is

The combination of a plate of iron or steel perforated and pressed into shape and filled with lead, as herein described and for the purposes specified.

In testimony whereof I have affixed my signature in presence of two witnesses.

FRANK WEAR.

Witnesses:

ADOLPH F. CUERIER, JAMES L. MAOLARY. 

